Step 1

Add the aquafaba, vinegar, mustard and salt to a bowl and blitz for a second with an immersion blender so everything is combined.

Step 2

Keep the immersion blender running constantly and VERY slowly drizzle in the oil, making sure it is fully combined as you go. If you add it too fast, the whole thing will turn liquidy and isn't redeemable. If you find you're getting a bit of oil on the top, stop adding the oil and just blend for a little while before continuing.

Step 3

The mayonnaise will suddenly turn thick. Once all the oil is combined and thoroughly mixed. Add in the lemon juice and garlic and mix thoroughly.